JP2782441B2 - Atmosphere cooling system in the containment vessel - Google Patents
Atmosphere cooling system in the containment vesselInfo
- Publication number
- JP2782441B2 JP2782441B2 JP63278262A JP27826288A JP2782441B2 JP 2782441 B2 JP2782441 B2 JP 2782441B2 JP 63278262 A JP63278262 A JP 63278262A JP 27826288 A JP27826288 A JP 27826288A JP 2782441 B2 JP2782441 B2 JP 2782441B2
- Authority
- JP
- Japan
- Prior art keywords
- air
- pedestal
- containment vessel
- cooling device
- area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Drying Of Solid Materials (AREA)
- Structure Of Emergency Protection For Nuclear Reactors (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は原子炉格納容器内雰囲気冷却装置に係り、特
にドライウェル内の温度を均一化するのに好適な原子炉
格納容器内雰囲気冷却装置に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an atmosphere cooling device in a containment vessel, and more particularly to an atmosphere cooling device in a containment vessel suitable for equalizing the temperature in a dry well. About.
従来、原子炉格納容器内を冷却する冷却装置として
は、格納容器内の上部と下部にそれぞれ上部冷却器と下
部冷却器を設け、上部冷却器で冷却した空気を格納容器
上部に給気する一方、下部冷却器で冷却した空気を格納
容器下部（例えば、ガンマーシールドエリアやペデスタ
ル内）に給気していた。Conventionally, as a cooling device for cooling the inside of the containment vessel, an upper cooler and a lower cooler are provided at an upper portion and a lower portion of the containment vessel, respectively, and air cooled by the upper cooler is supplied to the upper portion of the containment vessel. Then, the air cooled by the lower cooler was supplied to the lower part of the containment vessel (for example, in the gamma shield area or the pedestal).
ところが、このような構成された冷却装置では、原子
炉圧力容器下方のペデスタル内に低温部が発生し易かっ
た。すなわち、圧力容器下部には発熱量が小さく、また
暖かい空気は上方へ移動してしまうため、ペデスタル内
の温度が他よりも低くなってしまう。その結果、ペデス
タル内の相対湿度が高くなり、ペデスタル内に配設され
たCRD配管が腐食し易くなるという問題があった。However, in the cooling device configured as described above, a low-temperature portion was easily generated in the pedestal below the reactor pressure vessel. That is, the calorific value is small at the lower portion of the pressure vessel, and warm air moves upward, so that the temperature inside the pedestal becomes lower than the others. As a result, there is a problem that the relative humidity in the pedestal increases, and the CRD piping disposed in the pedestal is easily corroded.
一般に、CRD配管は不銹鋼材で構成されれいるが、ペ
デスタル内には微量の塩分が存在することが多く、不銹
鋼材でも耐食性には問題点が残っていた。Generally, CRD pipes are made of stainless steel, but traces of salt are often present in the pedestal, and even with stainless steel, there remains a problem in corrosion resistance.
そこで、ペデスタル内の温度を上げるために、ペデス
タルに換気口を設け、この換気口を通して格納容器上部
の暖気をペデスタル内へ導入し、ペデスタル内の相対温
度を下げるようにした冷却装置が提案されている（特開
昭61−100694号公報）。Therefore, in order to increase the temperature inside the pedestal, a ventilation device is provided in the pedestal, and through this ventilation hole, warm air at the upper part of the containment vessel is introduced into the pedestal, and a cooling device that lowers the relative temperature inside the pedestal has been proposed. (JP-A-61-100694).
しかしながら、上記従来技術では、格納容器上部から
換気口までの長い距離に恒って暖気を流送しなければな
らないため、暖気の温度が途中で低下してしまうことが
あり、ペデスタル内の温度コントロールが非常に難しい
という問題があった。However, in the above-mentioned conventional technology, since the warm air must be flowed in a long distance from the upper part of the containment vessel to the ventilation port, the temperature of the warm air may be reduced on the way, and the temperature control in the pedestal may be performed. There was a problem that it was very difficult.
本発明の目的は、ドライウェル内の温度を均一にする
とともに、その温度コントロールを容易に行なうことが
できる原子炉格納容器内雰囲気冷却装置を提供すること
である。An object of the present invention is to provide an atmosphere cooling device in a reactor containment vessel that can make the temperature inside a dry well uniform and easily control the temperature.
上記目的を達成するために、本発明は、冷却器（５）
で冷却した空気を、送風機（６）によって原子炉格納容
器（１）内で循環させ、該原子炉格納容器内の雰囲気を
冷却する原子炉格納容器内雰囲気冷却装置において、原
子炉圧力容器（２）下方のペデスタル（４）内と、ペデ
スタル外の原子炉格納容器内下方との間に、互いに無冷
却空気を流通させる無冷却空気流通手段を設けることに
より、原子炉格納容器下方のペデスタル内外間で、無冷
却空気の循環流が形成されることを特徴とするものであ
る。In order to achieve the above object, the present invention provides a cooler (5)
The air cooled in the reactor is circulated in the reactor containment vessel (1) by the blower (6) to cool the atmosphere in the reactor containment vessel. ) By providing uncooled air circulating means for circulating uncooled air between the inside of the lower pedestal (4) and the lower part of the containment outside the pedestal, the inside and outside of the pedestal below the reactor containment are provided. Thus, a circulating flow of uncooled air is formed.
上記構成によれば、冷却器により冷却した空気は、原
子炉格納容器の上部に給気され、原子炉格納容器下方の
無冷却の空気は、原子炉圧力容器下方のペデスタル内と
ペデスタル外の原子炉格納容器内下方との間で循環可能
になる。その結果、発熱量が多い原子炉圧力容器の上部
は冷却空気で充分に冷却されるとともに、原子炉格納容
器下方のペデスタル内外では温度の均一が図られ、ペデ
スタル内に低温部が生じることもなくなり、ペデスタル
内の相対温度の上昇を防止することができる。According to the above configuration, the air cooled by the cooler is supplied to the upper part of the reactor containment vessel, and the uncooled air below the reactor containment vessel is supplied to the inside of the pedestal below the reactor pressure vessel and to the atom outside the pedestal. It is possible to circulate between the inside of the furnace containment and the lower part. As a result, the upper part of the reactor pressure vessel, which generates a large amount of heat, is sufficiently cooled by the cooling air, and the temperature inside and outside the pedestal below the reactor containment vessel is uniform, so that low-temperature parts do not occur in the pedestal. Thus, it is possible to prevent the relative temperature inside the pedestal from rising.
以下に本発明の一実施例を図面に従って説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第１図は本発明の冷却装置の全体構成を示している。
図に示すように、原子炉格納容器（以下、格納容器とい
う）１の内部に原子炉圧力容器（以下、圧力容器とい
う）２が格納されている。圧力容器２の外側はガンマー
シールド壁３により囲まれ、ガンマーシールド壁３と圧
力容器２は下方よりペデスタル４によって支えられてい
る。FIG. 1 shows the overall configuration of the cooling device of the present invention.
As shown in the drawing, a reactor pressure vessel (hereinafter, referred to as a pressure vessel) 2 is stored inside a reactor containment vessel (hereinafter, referred to as a containment vessel) 1. The outside of the pressure vessel 2 is surrounded by a gamma shield wall 3, and the gamma shield wall 3 and the pressure vessel 2 are supported by a pedestal 4 from below.
また、ガンマーシールド壁３の外側には、冷却コイル
5Aを有する冷却器５が配設され、この冷却器５の下方に
送風機６が設けられている。送風機６と冷却器５は送風
ダクト７により連結され、送風ダクト７にはガンマーシ
ールドエリア給気ダクト８とCRDエリア給気ダクト９が
接続されている。ガンマーシールドエリア給気ダクト８
はガンマーシールド壁３を貫通して圧力容器２の外面に
達しており、またCRDエリア給気ダクト９はペデスタル
４を貫通してCRDエリア（ペデスタル内）10に達してい
る。なおCRDエリア給気ダクト９の途中には下部エリア
給気口9Aが設けられている。Also, a cooling coil is provided outside the gamma shield wall 3.
A cooler 5 having 5A is provided, and a blower 6 is provided below the cooler 5. The blower 6 and the cooler 5 are connected by a blow duct 7, and the blow duct 7 is connected to a gamma shield area supply duct 8 and a CRD area supply duct 9. Gamma shield area air supply duct 8
Penetrates the gamma shield wall 3 and reaches the outer surface of the pressure vessel 2, and the CRD area air supply duct 9 penetrates the pedestal 4 and reaches the CRD area (in the pedestal) 10. In the middle of the CRD area air supply duct 9, a lower area air inlet 9A is provided.
また、冷却器５は上部エリア給気ダクト11が接続さ
れ、その先端は圧力容器２の上部に達している。更に上
部エリア給気ダクト11にはバルクヘッド内給気ダクト12
が接続され、その先端はバルクヘッド13内に達してい
る。The cooler 5 is connected to an upper area air supply duct 11, and the tip of the cooler 5 reaches the upper part of the pressure vessel 2. Furthermore, the upper area air supply duct 11 has an air supply duct 12 inside the bulkhead.
Are connected, and the leading end thereof reaches the inside of the bulkhead 13.
なお、送風機６、送風機ダクト７およびCRDエリア給
気ダクト９は供給手段を構成している。The blower 6, the blower duct 7, and the CRD area air supply duct 9 constitute supply means.
次に本実施例の作用について説明する。 Next, the operation of the present embodiment will be described.
送風機６より直接吸込まれた空気は冷却器５により冷
却され、上部エリア給気ダクト11を介して圧力容器２の
上部へ給気されるとともに、バルクヘッド内給気ダクト
12を介してバルクヘッド13内へ給気される。そして、発
熱量の大きい圧力容器２上部を除熱しながら、ドライウ
ェル内を降下し、送風機６の近傍へ戻ってくる。一方、
送風ダクト７を途中で分岐した無冷却の空気はガンマー
シールドエリア給気ダクト８とCRDエリア給気ダクト９
へと送られる。ガンマーシールドエリア給気ダクト８へ
送られた空気は、圧力容器２の保温材発熱を除熱しなが
ら圧力容器２に沿って上方へ流れ、ガンマーシールド壁
２の上端を経て、上部エリア給気ダクト11から給気され
た空気と混合されてドライウェル下方部へ降下する。ま
たCRDエリア給気ダクト９へ送られた空気は、その一部
が給気口9Aより格納容器１内の下部エリアに給気される
とともに、残りがCRDエリア10内に給気される。CRDエリ
ア10内に給気された空気は換気口14を介して下部エリア
に排気される。The air directly sucked in from the blower 6 is cooled by the cooler 5 and supplied to the upper part of the pressure vessel 2 through the upper area air supply duct 11 and the air supply duct in the bulkhead.
Air is supplied into the bulkhead 13 via the air supply 12. Then, while removing heat from the upper part of the pressure vessel 2 having a large calorific value, it descends in the dry well and returns to the vicinity of the blower 6. on the other hand,
The uncooled air branched off the air duct 7 on the way is supplied to the gamma shield area air supply duct 8 and the CRD area air supply duct 9
Sent to. The air sent to the gamma shield area air supply duct 8 flows upward along the pressure vessel 2 while removing heat generated from the heat insulating material of the pressure vessel 2, passes through the upper end of the gamma shield wall 2, and passes through the upper area air supply duct 11. Mixed with the air supplied from the lower part of the drywell. Further, part of the air sent to the CRD area air supply duct 9 is supplied to the lower area in the storage container 1 from the air supply port 9A, and the rest is supplied to the CRD area 10. The air supplied into the CRD area 10 is exhausted to a lower area through the ventilation port 14.
以上のように、温度が高くなり易いドライウェル内の
上部に冷却した空気を、また中間部と下部には無冷却の
空気をそれぞれ供給することにより、ドライウェル内の
温度を均一化することができるとともに、CRDエリア10
内の相対湿度を低減することが可能となり、不銹鋼材の
環境条件を良好な状態に維持することができる。As described above, by supplying cooled air to the upper part of the dry well where temperature tends to increase, and uncooled air to the middle part and the lower part, the temperature in the dry well can be made uniform. Along with CRD area 10
The relative humidity in the interior can be reduced, and the environmental conditions of the stainless steel material can be maintained in a favorable state.
また、本実施例によれば、ガンマーシールド壁３内に
無冷却の空気を供給することにより、圧力容器２側部の
保温材表面温度と供給空気の温度差を小さくできること
から、除熱量を軽減することができる。Further, according to the present embodiment, by supplying uncooled air into the gamma shield wall 3, the difference between the surface temperature of the heat insulating material on the side of the pressure vessel 2 and the temperature of the supplied air can be reduced, thereby reducing the heat removal amount. can do.
さらに、本実施例によれば、格納容器１内の下部に送
風機６を設置して、その近傍に下部エリア給気口9Aを設
け、下部エリア内で空気の循環流が形成されるようにし
ているので、送風機６へ空気を直接吸込む方式が採用で
き、戻りダクト等を廃止することができる。Furthermore, according to the present embodiment, the blower 6 is installed in the lower part in the storage container 1, and the lower area air supply port 9A is provided in the vicinity thereof, so that a circulating flow of air is formed in the lower area. Therefore, a method of directly sucking air into the blower 6 can be adopted, and the return duct and the like can be eliminated.
第２図および第３図は本発明の他の実施例を示してい
る。なお、前述した実施例と同一の箇所には同一符号が
記されている。2 and 3 show another embodiment of the present invention. The same parts as those in the above-described embodiment are denoted by the same reference numerals.
第２図において、送風機６、冷却器５および上部エリ
ア給気ダクト11等は前述した実施例と同じである。本実
施例での特徴部分は、ガンマーシールド壁３を貫通して
ガンマーシールドエリアに達するガンマーシールドエリ
ア排気ダクト21と、ペデスタル４を貫通してCRDエリア1
0内に達するCRDエリア排気ダクト22とを設け、これらの
ガンマーシールドエリア排気ダクト21とCRDエリア排気
ダクト22を送風機６の吸込側に接続したことである。In FIG. 2, the blower 6, the cooler 5, the upper area air supply duct 11, and the like are the same as those in the above-described embodiment. The features of this embodiment include a gamma shield area exhaust duct 21 that penetrates the gamma shield wall 3 to reach the gamma shield area, and a CRD area 1 that penetrates the pedestal 4.
The gamma shield area exhaust duct 21 and the CRD area exhaust duct 22 are connected to the suction side of the blower 6.
このように構成すれば、CRDエリア10およびガンマー
シールドエリアにある空気を送風機６によって吸引する
と、下部エリアの空気が換気口14を介してCRDエリア10
およびガンマーシールドエリアに供給される。すなわ
ち、CRDエリア10およびガンマーシールドエリアには無
冷却の空気が供給されることになる。With this configuration, when the air in the CRD area 10 and the gamma shield area is sucked by the blower 6, the air in the lower area is transmitted through the ventilation port 14 to the CRD area 10
And the gamma shield area. That is, uncooled air is supplied to the CRD area 10 and the gamma shield area.
第３図は、送風機を上部送風機6aと下部送風機6bとに
分割した例である。図において、上部送風機6a、冷却器
５および上部エリア給気ダクト等は第１図の実施例と同
じである。本実施例では、ガンマーシールドエリアに連
通するガンマーシールド給気ダクト31と、CRDエリア10
内に連通するCRDダクト32が送風機6bの吐出側に接続さ
れている。また上部送風機6aの風量と下部送風機6bの風
量の和は、第１図に示した送風機６の風量に相当するよ
うに設定されている。FIG. 3 shows an example in which the blower is divided into an upper blower 6a and a lower blower 6b. In the drawing, an upper blower 6a, a cooler 5, an upper area air supply duct and the like are the same as those in the embodiment of FIG. In the present embodiment, the gamma shield air supply duct 31 communicating with the gamma shield area and the CRD area 10
A CRD duct 32 communicating with the inside is connected to the discharge side of the blower 6b. The sum of the air volume of the upper fan 6a and the air volume of the lower fan 6b is set so as to correspond to the air volume of the fan 6 shown in FIG.
本実施例においても、CRDエリア10およびガンマーシ
ールドエリアには無冷却の空気が供給されることにな
る。Also in this embodiment, uncooled air is supplied to the CRD area 10 and the gamma shield area.
以上説明したように、本発明によれば、原子炉格納容
器内の温度を均一化することができることともに、ペデ
スタル内の相対湿度を低く抑えることができ、不銹鋼に
対する環境を良好に維持することが可能となる。As described above, according to the present invention, the temperature in the reactor containment vessel can be made uniform, the relative humidity in the pedestal can be kept low, and the environment for stainless steel can be maintained well. It becomes possible.
第１図は本発明の実施例を示す全体構成図、第２図およ
び第３図はそれぞれ他の実施例を示す全体構成図ある。 １……原子炉格納容器、２……原子炉圧力容器、 ３……ガンマーシールド壁、４……ペデスタル、 ５……冷却器、6,6a,6b……送風機、 8,31……ガンマーシールドエリア給気ダクト、 9,32……CRDエリア給気ダクト、 14……換気口、 21……ガンマーシールドエリア排気ダクト、 22……CRDエリア排気ダクト。FIG. 1 is an overall configuration diagram showing an embodiment of the present invention, and FIGS. 2 and 3 are overall configuration diagrams each showing another embodiment. 1 ... Reactor containment vessel, 2 ... Reactor pressure vessel, 3 ... Gamma shield wall, 4 ... Pedestal, 5 ... Cooler, 6,6a, 6b ... Blower, 8,31 ... Gamma shield Area air supply duct, 9,32 CRD area air supply duct, 14 Ventilation port, 21 Gamma shield area exhaust duct, 22 CRD area exhaust duct.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) G21C 13/00──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. 6 , DB name) G21C 13/00
Claims (4)
（６）によって原子炉格納容器（１）内で循環させ、該
原子炉格納容器内の雰囲気を冷却する原子炉格納容器内
雰囲気冷却装置において、原子炉圧力容器（２）下方の
ペデスタル（４）内と、ペデスタル外の原子炉格納容器
内下方との間に、互いに無冷却空気を流通させる無冷却
空気流通手段を設けることにより、原子炉格納容器下方
のペデスタル内外間で、無冷却空気の循環流が形成され
ることを特徴とする原子炉格納容器内雰囲気冷却装置。1. An atmosphere in a reactor containment vessel for circulating air cooled in a cooler (5) in a reactor containment vessel (1) by a blower (6) to cool an atmosphere in the reactor containment vessel. In the cooling device, by providing uncooled air circulation means for allowing uncooled air to flow between the inside of the pedestal (4) below the reactor pressure vessel (2) and the inside of the reactor containment outside the pedestal. A circulating flow of uncooled air is formed between the inside and outside of the pedestal below the containment vessel.
冷却空気流通手段は、前記送風機の吐出側と前記冷却器
とを連結する送風ダクト（７）の途中に、前記ペデスタ
ル内に無冷却空気を供給する給気ダクト（９）と、前記
ペデスタル内の空気をペデスタル外の原子炉圧力容器下
方に排気する換気口（14）とを設けることによって構成
したことを特徴とする原子炉格納容器内雰囲気冷却装
置。2. The cooling device according to claim 1, wherein said non-cooled air circulating means is provided in said pedestal in the middle of a blow duct connecting said discharge side of said blower and said cooler. A reactor containment vessel characterized by comprising an air supply duct (9) for supplying air and a ventilation port (14) for exhausting the air in the pedestal below the reactor pressure vessel outside the pedestal. Internal atmosphere cooling device.
冷却空気流通手段は、前記送風機の吐出側と前記ペデス
タル内との間に給気ダクト（32）を設けるとともに、前
記ペデスタル内の空気をペデスタル外の原子炉圧力容器
下方に排気する換気口（14）を設けることによって構成
したことを特徴とする原子炉格納容器内雰囲気冷却装
置。3. The cooling device according to claim 1, wherein said non-cooled air circulating means provides an air supply duct (32) between a discharge side of said blower and said pedestal, and air inside said pedestal. An atmosphere cooling device in a containment vessel, characterized in that a ventilation port (14) for exhausting air from the reactor pressure vessel outside the pedestal is provided.
て、前記無冷却空気流通手段には、前記送風機とガンマ
ーシールド壁（３）内のエリアとの間に、無冷却の空気
を流通させるダクト（８、21、31）が付加されているこ
とを特徴とする原子炉格納容器内雰囲気冷却装置。4. The cooling device according to claim 1, wherein the uncooled air circulating means circulates uncooled air between the blower and an area in the gamma shield wall (3). An atmosphere cooling device in a containment vessel, wherein a duct (8, 21, 31) for causing the air to flow is added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63278262A JP2782441B2 (en) | 1988-11-02 | 1988-11-02 | Atmosphere cooling system in the containment vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63278262A JP2782441B2 (en) | 1988-11-02 | 1988-11-02 | Atmosphere cooling system in the containment vessel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02126190A JPH02126190A (en) | 1990-05-15 |
| JP2782441B2 true JP2782441B2 (en) | 1998-07-30 |
Family
ID=17594890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63278262A Expired - Fee Related JP2782441B2 (en) | 1988-11-02 | 1988-11-02 | Atmosphere cooling system in the containment vessel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2782441B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111128412B (en) * | 2019-12-31 | 2023-01-03 | 中国核动力研究设计院 | Heat pipe reactor core structure for multiple power generation modes |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61290394A (en) * | 1985-06-18 | 1986-12-20 | 株式会社日立製作所 | Cooling device for gas in container |
-
1988
- 1988-11-02 JP JP63278262A patent/JP2782441B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02126190A (en) | 1990-05-15 |
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